#40AE66
Closest named color: Seaweed Green (#35AD6B). oklch(67% 0.146 151.6), rgb(64, 174, 102).
Aa
Black text reads best on this color (7.46:1).
About this color
#40AE66 is a medium-light, vivid green. In OKLCH its lightness is 67%, its chroma 0.146 and its hue 152°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Seaweed Green (#35AD6B), ΔE 0.009 away. Black text reads best on it, at 7.46:1.
| Hue family | Greens |
| Lightness | medium-light (67%) |
| Chroma | vivid (0.146) |
| Temperature | in between |
| Nearest name | Seaweed Green (#35AD6B) |
| Black text | 7.46:1 |
| White text | 2.81:1 |
Values
| HEX | #40AE66 |
| RGB | rgb(64, 174, 102) |
| HSL | hsl(141, 46%, 47%) |
| OKLCH | oklch(67% 0.146 151.6) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #40AE66 | 2.81:1 | Fails | Lc -59.0 | Large or bold text, headings |
| Black text on #40AE66 | 7.46:1 | AAA | Lc 50.3 | Large or bold text, headings |
| #40AE66 text on white | 2.81:1 | Fails | Lc 53.7 | Large or bold text, headings |
| #40AE66 text on black | 7.46:1 | AAA | Lc -48.1 | Large or bold text, headings |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 400.
-
Step 50
50
#F0F8F1
oklch(97.1% 0.013 149.3)
-
Step 100
100
#DEEFE1
oklch(93.6% 0.026 150.8)
-
Step 200
200
#C2E3C9
oklch(88.5% 0.05 151.5)
-
Step 300
300
#94D2A3
oklch(80.9% 0.092 151.5)
-
Step 400
400 (this color)
#40AE66
oklch(67% 0.146 151.6)
-
Step 500
500
#00A552
oklch(63.2% 0.168 151.6)
-
Step 600
600
#008A44
oklch(55.5% 0.147 151.7)
-
Step 700
700
#007538
oklch(49.2% 0.131 151.5)
-
Step 800
800
#00602D
oklch(42.8% 0.114 151.6)
-
Step 900
900
#005024
oklch(37.7% 0.101 151.4)
-
Step 950
950
#003013
oklch(27.1% 0.072 151.4)
#40AE66 with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #AFA061 | 0.125 |
| Deuteranopia (no green cones) | #A0966B | 0.122 |
| Tritanopia (no blue cones) | #16AB9C | 0.078 |
| Achromatopsia (no color) | #9A9A9A | 0.147 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40AE66
#40AE66
oklch(67% 0.146 151.6)
- #C871BD
#C871BD
oklch(67.1% 0.145 331.8)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #40AE66, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Seaweed Green #35AD6B ΔE 0.009
- Jade Green #2BAF6A ΔE 0.010
- Algae #54AC68 ΔE 0.016
- Medium Sea Green #3CB371 ΔE 0.017
- Dark Seafoam Green #3EAF76 ΔE 0.020
- Dark Pastel Green #56AE57 ΔE 0.021
- Bluey Green #2BB179 ΔE 0.023
- Green Teal #0CB577 ΔE 0.026
Use #40AE66 in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.